Lock



FIG. 1 is a front elevation view of the lock of the present invention. FIG. 2 is a top plan view of the lock of the present invention. FIG. 3 is a side view of the lock of the present invention; the opposite side view is a mirror image thereof; and, FIG. 4 is a rear elevation view of the lock of the present invention. 

I claim the ornamental design for the lock, as shown and described. 